I am trying to verbs tacky grease past its sell-by date matt (small square mosaic) tiles. All scourers vacate colour on them? (the colour of the scourer, even wire wool leaves grey behind) so...

(the colour of the scourer, even wire wool leaves grey behind) so elbow grease doesn't minister to much! Any suggestions? Its the cooker 'splash back'. Thank you for your help
Answers:    The best Solution is pour Dawn Dish Soap beside Degreaser on it
Rub it in
later wash it sour
The Degreaser ingrediant in the soap really breaks up the Grease,
or try an solution that have a degreaser added to it , an extra strength one works nicely, dont use the rope brushes and if you use any the above suggestions you wont need elbow grease to verbs it just lots of hot marine then scrub beside a floor cleaner to make sure you get the soap off.
Try Clorox wipe...they work on everything!